31 favorite monsters: Mr. Mind
In my opinion the coolest, most original and most adorable supervillain of all time, this tiny, cartoonish alien worm was originally the arch-nemesis of Captain Marvel and leader of the global Monster Society of Evil, revealing his surprising true form in Captain Marvel Adventures #26, August 1943.
Now a part of the DC Universe alongside the likes of the Joker and Lex Luthor, Mr. Mind continues to make appearances nearly seventy years later, stirring up trouble with his parasitic mind-control and diabolical brilliance.